After successfully sending the acknowledgement email to myself on the last step, including updating the acknowledgement fields correctly, instead of verifying I get this error message:
'Step not yet complete in NPSP Playground
The flow component on the opportunity page doesn’t appear to be configured properly. Check your settings against the instructions and click Verify again.'
I have done this in two playgrounds with NPSP installed, with the same result. I am pretty sure I followed the instructions correctly both times. There is an issue with the instructions for sending the email from Gorav Patel - I have not been able to find a 'New Donation' button anywhere. I enabled 'Gift Entry' on the second org but that gives me a 'New Gift' button instead. I suspect that the person who wrote this up and did the verification check had a somewhat customised setup and is checking for something that doesn't usually exist. What have others experienced with this project?
Try it into new org and make sure there must be a developer org. It is difficult to complete this badge in playground.